.page-faq {
  --faq-body: #C8D8CE;
  --faq-index-w: 264px;
  --faq-line-top: calc(var(--header-h) + 20px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(96px, 14vw, 152px) 0 clamp(36px, 5vw, 64px);
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(13, 42, 31, 0.92) 0%, rgba(6, 23, 15, 0) 74%),
    repeating-linear-gradient(90deg, rgba(147, 167, 155, 0.08) 0 1px, transparent 1px 78px);
  clip-path: polygon(0 0, 100% 0, 100% 66%, 0 100%);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 12%;
  width: 1px;
  height: 62%;
  background: linear-gradient(180deg, var(--cyan), rgba(61, 240, 196, 0));
  opacity: 0.5;
  pointer-events: none;
}
.page-faq .faq-hero__shell {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}
.page-faq .faq-hero__main {
  max-width: 74ch;
}
.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--cream);
}
.page-faq .faq-hero__lede {
  margin-top: 20px;
  color: var(--faq-body);
}
.page-faq .faq-hero__stats {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(13, 42, 31, 0.72);
}
.page-faq .faq-hero__stats .stat-value {
  font-size: clamp(20px, 3.4vw, 28px);
  color: var(--cyan);
  letter-spacing: 0.02em;
}
.page-faq .faq-hero__stats .stat-label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}
@media (min-width: 900px) {
  .page-faq .faq-hero__shell {
    grid-template-columns: minmax(0, 1.7fr) minmax(280px, 1fr);
    align-items: end;
  }
}

/* ---------- 面板与筛选 ---------- */
.page-faq .faq-board .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-faq .faq-filter {
  margin: 22px 0 clamp(28px, 4vw, 44px);
}
.page-faq .faq-filter .chip[aria-pressed="true"] {
  border-color: var(--line-accent);
  color: var(--cyan);
  background: rgba(61, 240, 196, 0.08);
}
.page-faq .faq-filter .chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-board__wrap {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  min-width: 0;
}
@media (min-width: 960px) {
  .page-faq .faq-board__wrap {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding-left: 16px;
  border-left: 1px solid var(--line);
}
.page-faq .faq-index__title {
  margin: 0 0 12px;
  color: var(--muted);
}
.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
}
.page-faq .faq-index__item a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-faq .faq-index__item a:hover,
.page-faq .faq-index__item a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-accent);
}
.page-faq .faq-index__no {
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.8;
}
.page-faq .faq-index__foot {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}
.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-accent);
}
@media (min-width: 620px) and (max-width: 959px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 960px) {
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-line-top);
  }
  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}
.page-faq .faq-group {
  margin-bottom: clamp(36px, 5vw, 64px);
  min-width: 0;
  scroll-margin-top: var(--faq-line-top);
}
.page-faq .faq-group:last-child {
  margin-bottom: 0;
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--line-strong);
}
.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.page-faq .faq-group__head .type-h2 {
  margin: 0;
  font-size: clamp(20px, 3vw, 27px);
  color: var(--cream);
}

/* ---------- 图文块 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 12px;
  border: 1px solid var(--line);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-faq .media-caption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--line);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-q {
  position: relative;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-q[open] {
  background: linear-gradient(180deg, rgba(13, 42, 31, 0.55), rgba(13, 42, 31, 0));
}
.page-faq .faq-q[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(61, 240, 196, 0));
  transform-origin: left center;
  animation: faq-sweep 220ms var(--ease) both;
}
@keyframes faq-sweep {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-faq .faq-q > summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 18px;
  align-items: start;
  gap: 12px;
  padding: 16px 8px 16px 0;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-q > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q > summary:hover .faq-q__text,
.page-faq .faq-q > summary:focus-visible .faq-q__text {
  color: var(--cyan);
}
.page-faq .faq-q > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-faq .faq-q__no {
  padding-top: 4px;
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.75;
}
.page-faq .faq-q__text {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--cream);
  transition: color var(--dur) var(--ease);
}
.page-faq .faq-q__sign {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}
.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--muted);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-faq .faq-q__sign::before {
  width: 12px;
  height: 1px;
  transform: translate(-50%, -50%);
}
.page-faq .faq-q__sign::after {
  width: 1px;
  height: 12px;
  transform: translate(-50%, -50%);
}
.page-faq .faq-q[open] .faq-q__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}
.page-faq .faq-q[open] .faq-q__sign::before {
  background: var(--cyan);
}

.page-faq .faq-q__body {
  padding: 0 26px 20px 42px;
  animation: faq-drop var(--dur) var(--ease) both;
}
@keyframes faq-drop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 8px;
}
.page-faq .faq-steps li {
  position: relative;
  counter-increment: faq-step;
  padding-left: 34px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-body);
}
.page-faq .faq-steps li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  width: 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-steps a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-accent);
}
.page-faq .faq-note {
  margin: 12px 0 0;
  padding: 8px 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 2px solid var(--amber);
  background: rgba(242, 179, 61, 0.06);
}

/* ---------- 移动端分组双栏 ---------- */
.page-faq .faq-group__split {
  display: grid;
  gap: 20px;
  min-width: 0;
}
.page-faq .faq-group__col {
  min-width: 0;
}
.page-faq .faq-mobile-shot {
  margin: 4px 0 0;
  border: 1px solid var(--line);
}
.page-faq .faq-mobile-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
@media (min-width: 900px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    gap: 32px;
    align-items: start;
  }
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-more {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(21, 58, 43, 0.5), rgba(6, 23, 15, 0));
}
.page-faq .faq-more__shell {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  min-width: 0;
}
.page-faq .faq-more__lead .type-index {
  margin: 0;
  color: var(--orange);
}
.page-faq .faq-more__lead .type-h2 {
  margin: 10px 0 0;
  color: var(--cream);
}
.page-faq .faq-more__text {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-body);
}
.page-faq .faq-more__links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-faq .faq-more__links a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--panel);
  color: var(--cream);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-faq .faq-more__links a:hover,
.page-faq .faq-more__links a:focus-visible {
  background: var(--panel-2);
  color: var(--cyan);
}
.page-faq .faq-more__links .type-data {
  font-size: 11px;
  color: var(--cyan);
  opacity: 0.8;
}
@media (min-width: 900px) {
  .page-faq .faq-more__shell {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-q__body {
    padding-left: 0;
    padding-right: 0;
  }
  .page-faq .faq-q > summary {
    grid-template-columns: 24px minmax(0, 1fr) 16px;
  }
  .page-faq .faq-index {
    padding-left: 12px;
  }
  .page-faq .faq-hero::after {
    display: none;
  }
}
</main>